Indexing device for data on a circulating band



June 22, 1937. A. EBERHARDT INDEXING DEVICE FOR DATA ON A CIRCULATING BAND Filed June 22, 1933 2 Sheets-Sheet l fig. 1

June 22, 1937.

A. EBERHARDT INDEXING DEVICE FOR DATA ON A CIRCULATING BAND Filed June 22, 1953 2 Sheets-Sheet 2 ILUL ,0 ea l nlo Patented June 22, 1937 UNITED STATES INDEXING DEVICE FOR DATA ON A CIRCU- LATING BAND Alois Eberhardt, Frankfort-on-the-Main, Germany Application June 22, 1933, Serial No. 677,095

In Germany June 25, 1932 15 Claims.

This invention relates to devices for rapidly finding a certain note or group of notes from a number of notes arranged one behind the other ona circulating band according to certain signs, for example alphabetically arranged addresses or composite numbers arranged according to decimal groups, in that the band is rapidly passed in longitudinal direction under a Window having the same width as the band until signs applied on the band are visible in the window, corresponding or spatially registering with coordinate signs arranged on the window frame.

This object is attained according to the invention in that all the notes on the band are first subdivided into a number of main groups, for example in the case of alphabetical arrangement of the notes so that each of these main groups corresponds to a certain letter of the alphabet, that further each of these groups is marked on the band by a certain color extending along the whole length of the coordinate portion of the band, and that at least on one of the sides oi the window frame situated transversely to the running direction of the band markings with coordinate signs, for example the letters of the alphabet, are arranged in the corresponding color, so that the appearing of the desired main group immediately becomes conspicuous on the band, when it is passing under the window, by the appearance of the coordinate color.

The color of a longitudinal section of the band corresponding to each of such main groups may extend over the entire width of the band or in the form of a stripe only over a portion thereof.

A further subdivision of the main groups thus formed may, according to the invention, be effected by applying on the frame portion of the window .a number of bars in the corresponding colors extending over the entire width of the window in the colors corresponding to the number of main groups which exist, and in subdividing these bars in their longitudinal direction into separate port-ions corresponding to the desired subgroups, for example again to the letters of the alphabet and effecting the color marking of the band only in the form of stripes of the width of each portion of the colored bars fitted on the window frame, so that, for example for the letter A corresponding to the first group a stripe of the width of the corresponding section of the fixed bar extends along the left edge of the band on a corresponding sectional length of the whole sectional band portion designed for the main group. Extending therefrom a second stripe of the same width is applied on the band for the letter B on the length of the corresponding next subdivision of the main group and displaced towards theright a distance of a bar section and so forth.

If it is desired for example to divide a main roup designated by a certain color, for example red, into 10 subdivisions, it is necessary to subdivide the corresponding red bar fitted on the window frame into 10 equal sections provided with corresponding marks, such as letters of the alphabet and to arrange on the band a. similar number of stripes registering therewith in lateral direction and extending the length of each of these subgroups, and each of the width of one of the 10 sections of the bar.

If the number of the desired subdivisions of a main group is so large that the width of the individual part sections of the finder bars would become too small, as for example in the case of the 25 letters of the alphabet, it is possible to accommodate a portion, for example half of the sections on a bar arranged on the one frame side of the window and the remainder on another, for example similarly colored bar but fitted on the opposite frame side.

If the marking of the main groups is effected on the band by coloring same on its entire width, it is necessary to make the stripes for finding the subgroups particularly conspicuous on the band, for example by shading, supercol'oring or in some other suitable manner.

Each of the subgroups obtained in the man ner described can be again divided into further subgroups by the arrangement on the band of further finder stripes or finder lines differing from the stripes of the first subgroups by narrower width, and on one or both opposite sides of the window, of further correspondingly subdivided bars, the width of which is preferably chosen narrower than that of the main bars.

Several embodiments of the invention are illustrated by way of example in the accompanying drawings. It must, however, be pointed out that the protection claimed is in no way limited to the forms of construction and the coordinate details herein shown, but extends in general to devices constructed on the above mentioned principles. Parts of different colors are indicated by corresponding different hatchings.

Fig. 1 is a top plan view of the window of a device according to the invention together with the band fed thereunder.

Fig. 2 is a similar View on a smaller scale.

Figs. 3 and 4a are elevations of a portion of an of the same finder stripe or adjacent subsections of an adjacent finder stripe.

In the drawings the height of the window in the direction A.-D and 13-0 is shown much higher relative to its length than it is in reality in order that the band running under the same can be shown in greater length.

Fig. 1 shows an arrangement according to the invention in which the subdivision of the notes on the band is effected according to groups of figures. In the drawings the square enclosed by the lines ABCD indicates the window of the device under which the band covered with notes and signs is rapidly passed in longitudinal direction, for example by winding and unwinding over two rollers by means of cranks fitted one on each of the two rollers.

F1 to F10 are bars of the number and color of the main groups fixed on the corresponding opposite sides of the window frame, each of which corresponds to a group of 10 thousands and in turn is subdivided in the manner shown in the drawings into 10 sub-sections each corresponding to a thousand. In the same sequence of the colors as on the bars F1 to F10 correspondingly colored stripes are applied on the circulating band along a length of each corresponding main group of the notes and each of the width of one part section of the bars F1 to Fm, the length of each of such stripes corresponding to the length of a sub-group, and each of the stripes coordinated to one subgroup extending the one from the other on the band in such a manner that each of the stripes of a further subgroup is displaced laterally relative to the preceding stripe a distance equal to a part section of the fixed marking bars. Consequently, for each main group as many stripes of the color corresponding to the main group as the number of the desired subgroups are arranged successively on the band mutually laterally displaced.

Hsa and H51; are for example such, preferably transparent marking stripes applied on the band and of the width of the sub-sections of the main bars, of which for example, according to their lateral position on the band, the green stripe H53. registers with the subgroup 42000 of the corresponding green bar F5 and the similarly colored stripe Hat with the subgroup 43000 of the same bar.

Le are further narrower auxiliary bars ar ranged on the two opposite sides of the window frame and subdivided in the first half into hundreds and in the second half into tens, thereby enabling further subdivision, finder stripes Un of corresponding width being coordinated on the band for these narrow bars for the hundreds and still narrower finder lines 1 to 90 for the tens.

The adjustment of the finder stripes or lines on certain sections of the auxiliary bars can be facilitated by providing under these bars extensible stripes St as shown in Figs. 1, 2, 5, and 8 or other separate marking means which allow the part section of the auxiliary bars to be made more conspicuous during the finding operation and to thus facilitate the rapid adjustment of the band to the coordinate finder stripes or lines.

Example The manipulation of the device above described for finding on the circulating band a certain number, for example 42958, is as follows:-

According to Fig. 1 the numbers 40000 to 50000 belong to the main finder bar F5 colored for example green, and this finder bar is divided into ten subdivisions coordinate to the corresponding individual thousands, as is shown by the inscription of the bar F5 in Fig. l. According to this division the number group 42000-43000 is coordinated to the third section from the left of the bar F5.

In order to adjust to this sub-group of the green finder bar, the band which may primarily be in any other position is turned quickly in one or other direction until the green stripe designated by H521 in Fig. l and registering in its lat eral position on the band with the sub-section 42000 of the color finder bar F5 appears in the window. In order further to adjust to the horn dreds applied on the auxiliary bar Le, the band is turned until the narrow strip Un of the band corresponding to the sub-section 900 in its lateral position appears in the window and registers with the corresponding section of the auxiliary bar. In a similar manner the sought ten group is found by turning the band until the corresponding auxiliary finder line registers with the sub-section of the right half of the auxiliary bar Le designated by 50. Finally the notes coordinated to the last figure, 8 of the number being sought, are found on the band within the range of this auxiliary line.

Fig. 1 shows in the upper part of the band this number adjusted in the manner above described, the coordinate marking strips St being drawn out from the sub-sections of the auxiliary bar Le to render them more conspicuous.

In a similar manner for example the finding of the number 43047 shown in the lower half of Fig. l is effected by turning the band first to the likewise green colored strip of the band designated by 4300, then by continuing to turn the band until the narrow strip Un registers with the sub-section 0 of the auxiliary bar and finally by bringing the auxiliary finder line corresponding to the sub-group 40 of the auxiliary bar into the window, whereupon the last number 7 can easily be found directly on the band.

By the subdivision of the existing notes rendered possible by the invention not only in main groups distinguished by different colors, but also into sub-groups distinguished by means of further finder stripes or finder lines each of which sub-groups can then be further subdivided in such a similar manner, it is possible to considerably extend the subdivisions as compared with the devices known for this purpose. It must also be noted that the employment of finder lines or finder stripes of different colors may also be used in connection with the sub-groups.

Thus, for example, the narrower finder lines or finder strips designated in Fig. 1 by Un. and the numerals l to 90 may be arranged systematically colored or in different colors, in steps or stages and recur over the entire width of the track or a portion thereof,

The corresponding division of the band should be readable with sufiicient accuracy from the portion visible through the window AB--DC shown in Fig. 1.

Fig. 2 shows a similar arrangement with alphabetical subdivision, wherein for example the colored stripe Ha appearing in the window aperture AB-CD is adjusted to the letter R of the correspondingly colored bar and the finder line Un to the letter e of the auxiliary bar Le.

According to the form of construction illustrated in longitudinal section in Fig. 4 and in top plan view in Fig. 5 the color finder arrangement is not rigid in the form of bars on the frame of the window Fh for the main band, but is likewise arranged on a band Bh hereinafter referred to as the auxiliary band, which is guided past a separate Window Fe, for example over rollers.

In the form of construction of such an arrangement illustrated for example in these figures an auxiliary bar Le is not, as in the above described arrangement, arranged on the frame of the main window but on the frame r of the window for the auxiliary band and likewise provided with pull-out slides St for making a certain part section of the auxiliary barv during the seeking operation.

In the form of construction of such an arg rangement illustrated by way of example in this figure an auxiliary bar Le is not, as in the previously described arrangements, fitted on the frame of the main window, but on the frame 1' of the window for the auxiliary band and likewise provided with pull-out slides St for marking certain sub-sections of the auxiliary bar during the finding operation.

By means of this auxiliary band it is possible to always bring into the auxiliary window only the actually required bar of a main group colored in a certain color, so that in contradistinction to the construction as shown in Fig. 1 the other colored bars of the other main groups are not visible at the same time and therefore cannot disturb the vision. If the individual sub-sections of a main group are not applied on the auxiliary band side by side in the form of a continuous stripe, but laterally displaced one behind the other in the manner shown in Fig. 4a, it is also possible to expose only the subgroup of the main group actually required in the auxiliary window, whereby the arrangement becomes still more clear.

Fig. 5 shows in top plan view an adjustment in which the main band is adjusted so that its correspondingly colored finder stripe Ha comes below the main window on the letter R of the likewise colored transverse stripe of the auxiliary band Bh just adjusted by means of a knob Dr in the auxiliary window of the color finder arrangement and taking the place of a main finder bar, and in which the finder line Un of the main band is adjusted to the section ei of the rigid auxiliary bar Le fitted on the frame r of th window for the auxiliary band.

By arranging the color finder arrangement on a circulating auxiliary band, for example as shown in Figs. 4 and 5, the auxiliary bars, instead of being rigidly applied to the transverse portions of the main or auxiliary window frame, as above described, may, as shown for example in Fig. 3, be applied on the auxiliary band itself, in this instance evidently by printing. Thus, if the color marking of the main groups on the auxiliary band is effected by stripes extending over the entire width of the band, an auxiliary bar is arranged on the band between each two such stripes, or if the color marking of the main groups on the auxiliary band is subdivided in the the manner above indicated into sections arranged on the band one behind the other and mutually displaced laterally in the manner provided for the auxiliary band according to Fig. 4a.,

, a coordinate auxiliary bar is fitted between each two of these part sections as illustrated in Fig. 3.

Instead of being applied on such a separate interposed auxiliary stripe the sub-group divisions belonging to each of the colored individual sections on the auxiliary band may also be applied in the free space remaining on one or both sides of each of the individual colored sections in a line with the colored sections on the auxiliary band.

For the purpose of avoiding disturbances by the simultaneously visible bars or bar sections which are not actually required, the employment of covering devices both for the main and also if necessary for the for example colored auxiliary bars has been found advantageous in many instances.

Such a device is illustrated for example in Fig. 6 in top plan view and in Fig. 6a in longitudinal section in the form of a continuous band drawn over the for example colored bar L and interrupted only at one point by a Window R, so that only the part section of the bar directly below the window R is visible. By shifting the band on the bar, the window R can be adjusted to any desired part section, according to Fig. 6a to the part section thereof provided with the letter R.

To facilitate during the shifting of the band the finding of the part sections of bar L, the band may be made of transparent material or the bar may have for instance a mark on its edge.

If such a shiftable band with a window is employed, an empty section is preferably provided on the one end of the bar under it, over which the window has to be adjusted in case a section of this bar is just not wanted. This presents advantages, especially if two or more such bars fitted with windows shiftable on bands are arranged the one alongside the other in the arrangement shown in Fig. 1 (without shiftable windows).

A particularly clear marking of a desired separate section of a finder bar by color is obtained by employing a bar which itself is not colored at all, whereas a colored slide is provided which can be adjusted to the desired subsection of the non-colored bar. This slide may consist entirely of colored transparent material, such as celluloid or the like, or it may consist, according to the form of construction illustrated in Fig. 7 left and Fig. 7a of a sheet metal frame Sch in which a colored transparent window frame C i or example of celluloid is inserted and which can be adjusted to the desired sub-section of the noncolored bar. for example according to Fig. '7 to the section H of this bar, by sliding on the rod M. For the purpose of still better indicating the sub-section of the bar to be rendered conspicuous by this slide, an extension flap V may be provided besides the slide and slidable on the rod M therewith. This flap is preferably colored only on the inner side with the same color as the slide or slide window, whereas on its rear side it is not colored so that it is possible by swinging up this flap to cover the colored part of the slide or slide window as shown on the right of Fig. 7 on the part section between the letters J and L".

Further means of marking are shown in plan view in Fig. 8 and in cross section in Figs. 8a and 8b. In these arrangements double hinged flaps are coordinate to each part section of two parallel juxtaposed colored bars Fa and F1), the upper of these flaps having on the uncolored inner side a the sign corresponding to the part section of the upper colored bar in question, in the present instance for example the letter B of the capital alphabet, and the lower flap having on its lower likewise uncolored inner side b the mark of the corresponding part section of the lower colored bar. If, as shown in Fig. 8a, both flaps are folded outwards, the upper fiap covers the corresponding part section of the upper colored bar and the lower flap the corresponding part section of the lower colored bar, the marking oi these part sections being, however, visible from the corresponding signs applied on the inner sides of the coverin flaps. The outer side 0 of the upper flap bears the color and mark of the corresponding part section of the upper colored bar, whereas the outer side 02', of the lower fiap is provided with the color and the sign of the lower colored bar. If therefore, as shown on the right of Fig. 8 and in the lower flap is swung up over the upper flap, two sections appear the one above the other in the color with the marks of the exposed part section of the lower colored bar, in the present instance with the letter L.

If, however, the upper flapis folded down as shown on the left of Fig. 8 by the letter B, two sections provided with the corresponding letters and of the same color as the upper colored bar appear the one above the other, so that the adjustment of the correspondingly colored stripes Ha of the main band on the desired part section of the coordinate colored bar is facilitated.

The finder may be arranged overlapping like scales. The subgroup marks in the indicating position preferably extend into the free section of the finder window. If necessary, other covering devices may be -rovided for the subgroup bars than for the bars of the main groups.

The devices according to the invention owing to the extreme rapidity of the work obtainable therewith have proved particularly suitable, for example for finding addresses, accounts, railway time tables, library, store, stock and price lists, collections of samples, coding and decoding codes and the like marked on the circulating band.

The subdivision of the main and auxiliary bars may evidently be eifected in any desired manner according to the requirements of the actual individual instance. Thus, for example in the case of alphabetic arrangement, the sections of the bars fitted on one side of the frame of the main window serve for carrying the vowels, diphthongs and modulated vowels, and the sections of the bar fitted on the opposite side for carrying only consonants. correspondingly, in the case of arithmetical arrangement, each bar may be employed for bearing a diiferent decimal group, but one bar may also be constructed for carrying several decimal groups. A mixed arrangement of alphabetical and decimal groups is, for example likewise possible.

When the color finding arrangement is arranged on a circulating auxiliary band shlftable under a separate auxiliary window, it is possible to provide for each part section of the transverse color stripe on the auxiliary band, if necessary subdivided in the manner shown in 3, the subgroups of the auxiliary bars coming chiefly into question for this section and likewise fitted on the band, thus, for example according to Fig. 3, the subgroups b and oh for the letter A, the subgroups a and cm for the letter B and so forth. 1

A considerable advantage of the new arrangements consists in that the color finder arrange ment and the distribution of the groups on the main band can be adapted as desired to the actual length of this band and to the quality and kind of material registered, and that with the aid of the color finder arrangement a clearness and a rapidity of the work which cannot be surpassed is ensured and which allows the employment of band speeds for example up to 10 metres per second. By two or three quick operations that which it is desired to find will immediately by determined and indicated at what point and in which color the finder stripes and also the finder lines must appear. By the color alone a certain number of main groups are characterized, Whereas by the further subdivision each main and subgroup is clearly marked and found. If the user interrupts his work and has adjusted the marks for the main and subgroups to be found, these positively show him after the interruption what he was looking for.

The finding of a subgroup is considerably simplified as compared with the use of an ordinary card index and is due to a purely mechanical operation.

From the division of the color stripes into 2% letters as shown for example in Fig. 2, only one further subdivision of the auxiliary bars into 24 additional subdivisions produces already 5'76 subgroups for the finder lines.

The individual part sections of the bars may be of such width that they enable an excellent clearness and legibility of the signs printed thereon.

A considerable shortening of the main band may be obtained by applying the marks in two rows, that is by arranging the alphabetical arrangement in Z-shape.

Necessary extension of the individual main or subgroups of the band, should it be necessary to add further notes on fully utilized space, can be effected by inserting a new piece of band of suitable length at the desired point.

I claim:

1. In a device for finding individual notes on a. band, in combination a box-shaped housing, a window frame in said housing, rollers in said housing, a band on'said rollers adapted to be moved under said window frame, notes applied on said band one behind the other and arranged in groups and sub-groups, colored marking means on said band extending the length of each of these groups and subgroups, different colors being provided for the different groups of the first subdivision grade, stripes applied on the band in longitudinal direction parallel to one another, each stripe extending the length of one subgroup of notes and differing in its lateral position from the stripes coordinated to the other sub-groups of the same main group and finding stripes arranged adjacent said window frame transversely to said band corresponding in number to the nurnber of colors on the band each stripe being colored to correspond with the color of its coordinate main group on the band and being subdivided in sections in its longitudinal direction, each section corresponding in its lateral position to the lateral position of the longitudinal stripe coordinated to the corresponding sub-group of the notes on the band, and each section being provided with a special mark characterizing the corresponding sub-group.

2. In a device as specified in claim 1 a band colored in a diiferent color over its whole width for the length of each of the main groups of notes, stripes applied on the band in longitudinal direction parallel to one another each stripe extending the length of one sub-group of notes and diifering in its lateral position from the stripes coordinated to the other sub-groups of the same main group the said stripes differing in color fromthe color of the band section and finder stripes arranged adjacent the window frame transversely to the band corresponding in number to the number of colors on the band, each stripe being colored to correspond with the color of its coordinate main group of the band and being subdivided in sections in its longitudinal direction transversely to the band,

each section corresponding in its lateral position to the lateral position of the longitudinal stripe coordinated to the corresponding sub-group of the notes on the band, and each section being provided with the mark of the corresponding sub-group.

'3. In a device as specified in claim 1 stripes applied on the band in longitudinal direction each stripe extending the length of one first sub-group of notes and being colored in the same color as the color of the stripes coordinated to the other first sub-groups of the same main-group but in another color than the stripes coordinated to the other main groups, the stripes of each first sub-group differing in its lateral position from the stripes coorditil mated to the other first sub-groups of the same main group and finding stripes arranged adjacent the window frame transversely to the band corresponding in number to the number of colors on the band each stripe being colored to correspond with the color of the stripes of its coordinate main group on the band and being subdivided in sections in its longitudinal direction each section corresponding in its lateral position to the lateral position of the longitudinal stripe on the band coordinated to the corresponding sub-group of the notes on the band and each section being provided with the mark of the corresponding first sub-group.

4. In a device as specified in claim 1 stripes applied on the band in longitudinal direction each stripe extending the length of one first subgroup of notes and being colored in the same color as the color of the stripes coordinated to the other first sub-groups of the same maingroup but in another color than the stripes coordinated to the other main groups, the stripes of each first sub-group differing in its lateral position from the stripes coordinated to the other first sub-groups of the same main group, other stripes applied on the band, each such stripe extending the length of one second sub-group of notes and being narrower than the first named stripes and being colored in the same color as the color of the stripes coordinated to the other first and second sub-groups of the same main group, but being colored in another color than the stripes coordinated to the other main groups,

the stripes of each second sub-group differing in its lateral position from the stripes coordinatedto the other second sub-groups of the same first sub-group, finding stripes on the 7 window frame corresponding in number to the number-of colors in the band, each stripe being colored to correspond with the color of the stripes of its coordinate main group on the band and being subdivided in sections in its longitudinal direction, each section corresponding in its lateral position to the lateral position of the longitudinal stripe coordinated to the corresponding sub-group of notes and at least one auxiliary finder stripe on the window frame besides the main finder stripes, said auxiliary stripe being divided into a number of sections corresponding to the number of second subgroups of notes on the band, each of said sections corresponding in its lateral position to the lateral position of the longitudinal stripe on the band coordinated to the corresponding second sub-group of the notes on the band, each section of the main and auxiliary finding stripes being provided with the mark of the corresponding first and second sub-group on the band.

5. In a device as specified in claim 1 at least one auxiliary finder stripe on the window frame transversely to the band besides the main finder stripes, said auxiliary stripe being divided into a number or" sections corresponding to any desired number of sub-groups of minor notes on the band, each of said sections being provided with the mark of the coordinate minor sub-group, longitudinal stripes or lines on the band extending the length of each of such minor sub-groups and narrower v 6. In a device as specified in claim 1 a second window, an auxiliary band, and means for moving said auxiliary band in longitudinal direction under said second window, difierently colored finder stripes arranged one behind the other on said auxiliary band transversely to its longitudinal direction, said stripes adapted to be brought singly and consecutively under the second window during the movement of said auxiliary band, said finder stripes being subdivided into sections provided with the marks of the coordinate note groups of the main band.

7. In a device as specified in claim 1 a second window, an auxiliary band and means for moving said auxiliary band in longitudinal direction under said second window, sections arranged side by side and one behind the other in checkered arrangement on the auxiliary band, each stepped row of sections extending diagonally over the Width of the band being colored a difierent color to that of the other rows, each such row representing as a whole a color finding stripe coordinated to a main group of the colored main stripes on the band, the individual sections of the row coordinated to the sub-groups of the notes on the main band and provided with their marks being arranged on the auxiliary band in steps not only side by side but at the same time one behind the other so that, at every adjustment of the auxiliary band under the second window, always only one such section is visible.

8. In a device as specified in claim 1 a second window, an auxiliary band, and means for moving said auxiliary band in its longitudinal direction under said second window, differently colored finder stripes arranged one behind the other on said auxiliary band transversely to its longitudinal direction, said stripes adapted to be brought singly and consecutively under the second window during the movement of said auxiliary band, said finder stripes being subdivided into sections provided with the marks of the coordinate note groups of the main band, auxiliary finder stripes applied on the auxiliary hand between two main iii) color finder stripes, each of said auxiliary finder 75 stripes being subdivided into subsectionsprovided with the marks of the coordinate sub-groups of notes on the main band.

9. In a device as specified in claim 1 a second window, an auxiliary band and means for moving said auxiliary band in its longitudinal direction under said second window, sections arranged side by side and one behind the other in checkered arrangement on the auxiliary band, each stepped row of sections extending diagonally over the width of the band being colored a diiferent color to that of the other rows, each such row representing as a whole a color finding stripe coordinated to a main group of the colored main stripes on the band, the individual sections of the row coordinated to the sub-groups of the notes on the main band and provided with their marks being arranged on the auxiliary band in steps not only side by side but at the same time one behind the other so that, at every adjustment of the auxiliary band under the second window, always only one such section is visible, auxiliary finder stripes applied between each two colored sections on the auxiliary band, each of said last mentioned stripes being subdivided into sub-sections provided with the marks of the coordinate sub-groups of notes on the main band.

10. In a device as specified in claim 1 a second window, an auxiliary band and means for moving said auxiliary band in its longitudinal direction under said second window, sections arranged side by side and one behind the other in checkered arrangement on the auxiliary band, each stepped row of sections extending diagonally over the width of the band being colored a different color to that of the other rows, each such row representing as a whole a color finding stripe coordinated to a main group of the colored main stripes on the band, the individual sections of the row coordinated to the sub-groups of the notes on the main band and provided with their marks being arranged on the auxiliary band in steps not only side by side but at the same time one behind the other so that, at every adjustment of the auxiliary band under the second window, always only one such section is visible, the portion of the auxiliary band situated laterally of each colored individual section remaining at the same height as the same, visible at the same time as the individual section in the auxiliary window and differently colored to the individual section, being subdivided into sections with the marks of the sub-groups of the main group represented by the coordinate colored individual sections.

11. In a device as specified in claim 1 slides each coordinated to one section of a finder stripe arranged on the window frame and adapted to be pulled out in the longitudinal direction of the band to more clearly indicate the individual subsections of the finder stripe to which the band is to be adjusted.

12. In a device as specified in claim 1 elements .adapted to cover the adjacent sections of adjacent finder stripes on the window to indicate individual sections of the finder stripes.

13. In a device as specified in claim 1 finder stripes corresponding in number to the number of main note groups on the band arranged parallel to one another on the window frame transversely to the band, each of said stripes being subdivided into sections corresponding to the sub-groups of each main group and provided with the marks of the sub-groups, a slide bar on a longitudinal edge of at least one of said finder stripes directed towards the window, at least one two-part flap slidable on said slide bar, one part comprising a colored window always bearing on the finder stripe and the other part colored on its inner side with the color of the window and non-colored on its outer side, said last mentioned part adapted to be folded outwards to expose the window andextend the section of the finder stripe in the same color towards the window and to be folded inwards to cover the window and the section of the finder stripe situated thereunder.

14. In a device as specified in claim 1 a plurality of differently colored finder stripes corresponding to the number of main note groups on the band arranged parallel to one another adjacent the window transversely to the band, each of said stripes subdivided in its longitudinal direction into sections corresponding to the subgroups of the main groups on the band and each provided with the marks of its coordinate sub-groups, the band provided in its longitudinal direction along the length of each sub-group of notes with a stripe in the color of the finder stripe on the window corresponding. to the coordinate main group on the band, the lateral position of said stripe on the band being different from the similarly colored stripes coordinated to the other sub-groups of the same main group corresponding with the coordinate section of the finder stripe on the window, hinges arranged between each two corresponding sections of two adjacent finder stripes, two-part flaps each rotatable about one of said hinges, each flap bearing on its non-colored inner side the mark of the section of the finder stripe on which it bears when folded outwards, whereas its outer side is colored in the same color as this finder stripe and is provided with the mark of the coordinate section thereof.

15. In a device as specified in claim 1 a plurality of differently colored rigid finder stripes corresponding to the number of main note groups on the band arranged parallel to one another adjacent the window transversely to the band, each of said stripes subdivided in longitudinal direction into sections corresponding to the subgroups of the main groups on the hand these sections provided with the marks of its coordinate sub-groups, a band provided in its longitudinal direction .along the length of each sub-group of notes with a stripe in the color of the finder stripe on the window corresponding to the coordinate main group, the lateral position of said stripe being different from the similarly colored stripes coordinated to the other sub-groups of the same main group owing to its lateral position corresponding with the coordinate section of the finder stripe on the window, a band slidable on at least one of the rigid colored finder stripes in the longitudinal direction thereof, said band made of opaque material with a transparent window of a width corresponding to that of a subsection of the finder stripe.

ALOIS EBERHARDT. 

